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Let’s Review

In the mall parking lot, 60% of the cars are blue. If there are 300 cars in the parking lot, how many are blue?. In this lesson you will learn to calculate the part when you know the percent and the total by using a double number line. Let’s Review. 60% = 60 percent = 60 for every 100.

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Let’s Review

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  1. In the mall parking lot, 60% of the cars are blue. If there are 300 cars in the parking lot, how many are blue?

  2. In this lesson you will learn to calculate the part when you know the percent and the total by using a double number line.

  3. Let’s Review 60% = 60 percent = 60 for every 100 A percent is a part-to-total ratio where the second number is always 100.

  4. Let’s Review 5 ways to solve a ratio problem 1) Table with addition 2) Table with multiplication 3) Double number lines 4) Tape diagrams 5) Graphing

  5. Thinking that a ratio describes just one situation Example: 1 pink sweater for every 5 sweaters 1 out of 5 is pink. 2 out of 10 are pink. 3 out of 15 are pink.

  6. In the mall parking lot, 60% of the cars are blue. If there are 300 cars in the parking lot, how many are blue? KNOW Percent: 60 for every 100 cars are blue. Total: 300 cars CALCULATE Part: ??? blue cars

  7. KNOW Percent: 60 for every 100 cars are blue. Total: 300 cars CALCULATE Part: 180 blue cars 0 60 120 180 0 100 200 300 blue cars total cars

  8. 0 60 120 300 0 100 200 x3 180 blue cars total cars x3

  9. In this lesson you have learned to calculate the part when you know the percent and the total by using a double number line.

  10. Nick has 20 baseball cards. 40% of his cards are players on the Washington Nationals team. How many of his cards are Nationals players?

  11. Rewrite the example problem from this lesson so that the answer is 240 blue cars. See if you can find more than one way to rewrite the problem.

  12. In the mall parking lot, 60% of the cars are blue. If there are 450 cars in the parking lot, how many are blue?

  13. In the library, 25% of the books are non-fiction. If there are 200 books in the library, how many are non-fiction books?

  14. Paul had $500 in his savings account. He spent 25% of his savings on a new bike. How much money did he spend on the bike? There are 50 cars parked in the lot outside the movie theater. 20% of the cars are red. How many red cars are in the parking lot?

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